Added shutter speed flag to imagesnap, update GH config

`-w 2` added to the imagesnap call because of darkness [issues](https://github.com/rharder/imagesnap/issues/4) and changed username lookup to use `user.name` instead of `github.user` [(old)](https://help.github.com/articles/setting-your-username-in-git/).
Removed silent flag for image snap
Removed forking
removed split() for subprocess check_output
Maybe string concat issue
Added print
Fixed hard copy command in install script
Merge branch 'shutter-speed-fix-for-mba' of github.com:thecalvinchan/gitshots into shutter-speed-fix-for-mba

Conflicts:
	hooks/post-commit.py